Like many previous pandemics, the COVID-19 pandemic most likely started when a new coronavirus crossed over from wildlife to humans. Unfortunately, our destruction of the planet is causing new disease outbreaks, and we can expect many more pandemics to come unless we change our ways and build a more harmonious relationship with nature. This week’s episode is a throwback to April 2020, when we spoke with two top experts on the spread of zoonotic diseases about how biodiversity loss causes pandemics – and what we can do about it.